Activated Carbon Block Filter Cartridge (CTO/CBC) The carbon filter cartridge is made of sintered or extruded high-density activated carbon provides superb filtration up to 5 micron. Recommended for the removal of heavy chlorine contaminates organic contamination. It improves taste and smell of water, as well as elimination organic contaminants, pesticides and other chemicals. Filtration area of carbon block cartridge is almost double that of regular granule carbon filter, therefore it has larger absorption capacity and longer filtration life. • Length: 5, 10, 20, 30, 40 inch • Filtration precision: 1, 5, 10, 20 micron • Outside diameter: 2.5, 4.5 inch • Operating temp/Max operating pressure: 4°C~52°C/100 PSI • Max flow: 10’’ standard: 2.5GPM, 10’’ big blue: 5GPM (1.5~2kg/cm³)